基于三层C/S结构的网上答疑系统的设计

Design of net answer system based on three tier C/S construction

介绍了在Delphi下利用MIDAS技术开发三层分布式数据库系统的方法 ,应用该方法设计了网上答疑系统 .该系统具有三层C S模式 ,后台采用MicrosoftSQLServer数据库 .系统为用户提供了网上答疑板和在线答疑 2种方式 ,网上答疑板是在网上为每位教师、每门课程提供的答疑空间 ,学生和教师可随时登录到答疑板上提问和解答 ;在线答疑实现了教师和学生同时在网上交谈式的答疑 .

The method of empoldering three tier distributed database application system by Delphi's MIDIAS is introduced. The net answer system is designed based on MIDAS technology. This system adopts three tier C/S mode. The database is Microsoft SQL SERVER. This system provides two ways of answering questions. One is answering on answer board, the other is answer online. Net answer board providers a answering space for every teacher and every course on net, At any moment students and teachers may log in here for asking or answering questions. Answer online is answering question by way of talking on net when teachers and students are on net.